VISION David Gross A PERSPECTIVE ON STRING !THEORY! ! David Gross! !Institute For Theoretical Physics, Santa Barbara !n"rna#onal Conference on S$ing %eory& 'eijing, China& (ugust 17, 2002& PERSPECTIVES STRINGS 2007 MADRID DAVID GROSS OPENING REMARKS David Gross srings 2011 UPPSALA JUNE 27-JULY 2 OPENINGwww.strings2011.se REMARKS Organizers: DavidLars Brink Gross Ulf Danielsson Ulf Lindström Joseph Minahan Antti Niemi Maxim Zabzine Kjell och Märta Beijers Stiftelse CLOSING REMARKS David Gross CLOSING REMARKS David Gross The Scientific Method INFLATION The inflaonary paradigm is so flexible that no test or combina-on of tests can disprove it. STRING THEORY String Theory is so flexible that no test or combina-on of tests can disprove it. "Richard Dawid argues that string theory plays a novel role in the scientific process that has been neglected by philosophers of science. I believe that this book is a valuable contribution to the philosophy of science, which should interest practicing scientists as well as those who are more interested in the methodology of science." John Schwarz "At the frontiers of physics and cosmology theoretical speculation proceeds without the constant confrontation with experiment often thought to be required for scientific validation. Richard Dawid explores this issue in the case of string theory. He offers a fascinating new perspective on non- empirical theory assessment, DG ★ UEA = Unexpected Explanatory Coherence Asymptotic Freedom --> Confinement Dual Resonance --> String Theory -->Gravity , SuperSymmetry, Unification, Black Hole Entropy -->,......... ★ NAA = No Alternative Argument ★ MIA = Meta Inductive Argument The success (emperical) of other theories in the research program The Standard Model, Supersymmetry ?, .... HOW DO THE FORCES UNIFY? S STRONG T O String Theory R F E F WEAK N O UNIFICATION G R T C E & M H E GRAVITY Inflation TEV 1013ev 28 10 ev ENERGY My Theory of History Good Things t STRING THEORY IS ALIVE & HEALTHY MANY NEW & BRILLIANT STRING THEORISTS THE STRINGS CONFERENCE CONTINUES TO FLOURISH INDIA: ICTS in Bangalore 2015 CHINA: Tsingua in Beijing 2016 And the site of the “Great Collider” ISRAEL: 2017 JAPAN: 2018 BELGIUM : 2019 ? MIT-HARVARD, STANFORD, CHICAGO, ......???? THE END.